At the BNP Paribas Open, many of the top seeds take part in celebrity events and there was one with an extra special cause.

Word No. 1 Simona Halep, Jelena Ostapenko, Frances Tiafoe and Steve Johnson supported ACEing Autism, a charity connecting children on the autism spectrum with tennis.

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The Romanian, who is the top seed in Indian Wells, enjoyed her time with the children.

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She even gave them some volleying tips.

Tiafoe was taking part in the exhibition for the second year running.

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Overall, it was an incredible evening for ACEing Autism and all the fans in Palm Springs.